Pharmaceutical product containing arsenic.



- zoare' whitishto'brownish crystalline comphenyl' ropiolic acid-and PBr forms yel- 70 7 {K I Example 2: parts of phenylpropiolic ofi therefrom upon treatment with d' ute i AsBr are heated during about twentypounds being obtained, substantially as deiour hdilrs to 100 C! From the mass of the scrlbed.

j STATES PlgfENT OFFICE.

mm. rrscmm, or BERLIN, GERMANY; ASSIGNOR T0 svn'rnn'rrc murmurs co., mo. a or new gonna. Y., a conrommron or new YORK.

1, Specification of Letters Patent. P t t A 11 9 I 'mmwa Application filed lgiovember 27; 1914. Serial No. 874,363.

- To all whom it may concern:- acidcontaining' arsenic and bromin is insolu- Be it known that I, EMIL FISCHER, doctor He in water, almost insoluble in petrolether of philosophy, professor ofchemistry, citiand soluble in acetone and benzol. zen of the German Empire, residing at Ber- In order to convert the above pr ducts 5 lin, Germany, have invented new and useful into another val'uable'product either di said Improvements in Pharmaceutical Products products is then dissolved at 0 C. in 8 parts Containirgg Arsenic, of which the following of 1.5 normal caustic potash lye. Into the ,is a .speci cation. I I filtered liquid a current of CO isintroduced.

I The phenylpropiolic acid A crystalline precipitate being an acid po- 19 H I tassium sa t 'contai'nmg water of crystal iza- .CBH5. OECCOOH tion separates, which is collected on a lter.

possesses the property hitherto not yet ob--' and is recrystallized from 10 parts of hot served that on being heated with halogen water. -After drying the sal t'is a-colorle ss, compounds of arsenic it combines with these powder containing (after being freed from 4 15 products. The new;pr o ducts thus'obtained the water of crystallization) about 17 per are absorbed in the digestive organs and apcent. of arsenic and being free from halogen.

' peartherefore to be'valuable for therapeu- On being heated with an excess of alkali on ticfpur oses; The products thus obtained the water bath-As o -is. split off. I contain alogen in addition tov arsenic. They The analogous product obtained from pounds practically insoluble in water and lowishrown crystals melting 'at from 255- solublein acetone. Upon treatment with 258. C. It is insoluble in water, soluble in "weak alkalis the halogen is split oif and j acetone and benzene. Acid potassium and alkali salts of. new products are obtained, acid sodium salts of products containing 25-which are likewise valuable for'therapeutic arsenic are obtained, from it as above de- .f' ur'posea s'cribedr I In order to illustrate the new process more I claim I fullythe following examples are given, the 1. The here1n described new phenylpro- .I- parts b i b i ht: piolic acid compounds containing arsenic 30' Example '1 20 parts of phenylpropiolic and halogen, which are crystalline whltlsh acid and 50 parts of arsenic trichlorid to brownish compounds practically insoluble (A301,) are heated during 24 hours to 100 in water and soluble in acetone, halogen be- C. From the mass of therea'ction the new. ing split off therefrom-upontreatment with substance-separates in the shape of leaflets dilute caustic alkalis, alkali salts of arsenic 35 which are washed with ether and recrystalcompounds being obtalned, substantially as lized from this li nid. Colorless crystals redescribed. I sult containing about 16 per cent. arsenic 2. The herem described new phenylproand 14.5 per cent. chlorin. My new product PlOllC acld compounds contam ng arsenic is insoluble in water and soluble in hot aceand chlorin, which are crystalline whitish T40 tone, chloroform and benzene, soluble with compounds practicallyjnsoluble- 1 n water, more difliculty in ether. and soluble in acetone, chlo'rm being s ht,

and and 80- parts of arsenic tribr'omid caustic alkalis,-alkali salts o'tarsenic comreaction the new substance is isolated by 3. The herein described new produet,bewashing with ether to which petrolether is a. phenyipropiohc and compound cons'ubmuently added. In this way crystals taming arsenic and chlorm, which s a whitare recipitated whichare urified by recryslsh crystalllnecompound insoluble m' water I 50 talhzation from benzol. The resulting new and soluble n hot acetone, chloroform and loo m 3 1pm; treatmem with narmal caustic add potassium saltbbing ab about; 1'? per cent. ofamer: a 'fmm (blarin ,-.subsfi anizia}ly kit. a imony vmemf Ti haw: here mt- 3 5%;5' 

